BISF RE is my house a bisf house?

I am struggling to find out whether my house is a BISF house my postcode is bh118bq number 91. Also i know work was carried out in the area in 1996/97 by the council and a brick skin now covers all the house. I am currently selling my house and my buyers lender has told them " it's a metal house on stilts" I have asked the council several times to help me with this but am getting no where